Select true statements :-
(a) Lenticels are absent in woody climbers and leaves
(b) Lenticles occur in most woody trees
(c) The spring wood is lighter in colour and has a lower density
(d) The sap wood also called as duramen

Options

A. a , b and c are correct
B. a and b are correct
C. b and d are correct
D. a and c are correct

Answer

To solve the question, we need to evaluate each of the four statements regarding lenticels, spring wood, sap wood, and their characteristics.

### Step-by-Step Solution:

1. **Evaluate Statement (a)**: "Lenticels are absent in woody climbers and leaves."
- Lenticels are small pores found in the stems of woody plants that facilitate gas exchange. They are typically absent in leaves and woody climbers.
- **Conclusion**: This statement is **true**.

2. **Evaluate Statement (b)**: "Lenticels occur in most woody trees."
- Lenticels are indeed present in most woody trees as they play a crucial role in gas exchange.
- **Conclusion**: This statement is **true**.

3. **Evaluate Statement (c)**: "The spring wood is lighter in colour and has a lower density."
- Spring wood is formed during the growing season and is characterized by lighter color and lower density compared to autumn wood, which is darker and denser.
- **Conclusion**: This statement is **true**.

4. **Evaluate Statement (d)**: "The sap wood also called as duramen."
- This statement is incorrect. The sap wood is the outer layer of wood that is involved in the conduction of water and nutrients, while duramen (or heartwood) is the inner, usually darker part of the wood that provides structural support.
- **Conclusion**: This statement is **false**.

### Final Evaluation of Statements:
- Statements (a), (b), and (c) are true.
- Statement (d) is false.

### Answer:
The true statements are (a), (b), and (c).